To personally verify this, you should visit the temples located within the city of Shravanabelagola. Entering the temple, you will be amazed at what you see, because the columns, with perfectly executed carvings, will be open to your eyes.
Officially, this temple complex dates back to the beginning of the 12th century of our era. At the first glance, anyone who has ever been to a labor lesson and saw how a teacher grinds a carved leg out of a wooden blank of a bizarre shape, will catch himself feeling déjà vu. After all, ideally flat concentric edges can only be obtained with a rotational movement of the workpiece and precise positioning of the cutter.
For modern machines and architects, this task is not difficult.
An example of modern production and equipment:
The only difference is the fact that it is economically unprofitable to process a large billet and therefore the columns are made in segments and then assembled.
Promotional video:
And in the temple we see the columns, created more than 1,300 years ago, which are made from a single piece of granite! Moreover, upon closer examination, it can be seen that absolutely all columns are made the same, which is completely excluded with the manual version. Such precision of execution can only be achieved by a robotic machine with CNC control.
I would also like to pay special attention to the square elements of the columns, which do not carry an aesthetic load.
Modern historians and archaeologists have explained these elements very simply: this is a cult structure in which people worshiped gods, therefore the unusualness of the columns is explained by the desire of a person to highlight and emphasize the status of the sanctuary.
But if you look at these objects from the technical point of view, then there are several interesting analogies with modern elements of the construction and energy industries.
Here, for example, are quite modern supports for an adjustable floor, with the help of which builders fill the floors.
It is likely that the ancient Indians simply imitated their predecessors and performed the columns on the ancient equipment still working.
Here is another interesting analogy with the power elements of the power industry:
These switches and current transformers are strikingly reminiscent of columns. It can be assumed that a conductor was previously wound in the grooves of the columns and thus this temple turns from a place of worship of the gods into an ancient power plant.
From all that we have seen, we can only say with confidence that these columns are made using special machines, which already confirms the extremely high technogenic level of development in Ancient India. And for what purposes this building was used remains a mystery.